Bitcoin Up or Down - October 18, 12:30AM-12:45AM ET
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Bitcoin Up or Down - October 18, 12:30AM-12:45AM ET
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AI Analysis
Trader mode: Market mechanics, assumptions and risks
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Reported volume · provider units
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Reviewed equivalent pairs
Source snapshot: Oct 18, 2026, 12:00 AM UTC
About This Event
This market will resolve to "Up" if the time-weighted average price (TWAP) of Bitcoin, generated by Chainlink, of the time range specified in the title is greater than or equal to the price at the beginning of that range. Otherwise, it will resolve to "Down". The resolution source for this market is information from Chainlink, specifically the BTC/USD TWAP data stream available at https://data.chain.link/streams/btc-usd-twap-60s-streams. Please note that this market is about the price according to the TWAP Chainlink data stream for the asset pair BTC/USD, not according to any other sources or spot markets.
Snapshot observed 2026-10-18T00:00:06.191Z. This analysis describes that snapshot and is not a live news update.
What the contract measures
This Polymarket contract, titled "Bitcoin Up or Down - October 18, 12:30AM-12:45AM ET," covers a 15-minute window [1]. It resolves to "Up" if the time-weighted average price (TWAP) of Bitcoin over that window is greater than or equal to the price at the start of the window. Otherwise it resolves to "Down" [1].
The resolution source is the Chainlink BTC/USD TWAP data stream. The rules state that the market concerns "the price according to the TWAP Chainlink data stream for the asset pair BTC/USD, not according to any other sources or spot markets" [1]. A contract on a different index, exchange, or time window would not share these rules, so its price should not be compared directly with this one.
The listed end time is 2026-10-18T04:45:00.000Z [1]. This is the close of the contract, not a confirmed resolution time. The evidence does not show when or how the outcome was determined.
Reading the snapshot
The provider observed the market at 2026-10-18T00:00:06.191Z, and the source was retrieved at 2026-10-18T00:58:38.381Z [1]. The prices recorded at observation were 0.505 for "Up" and 0.495 for "Down" [1]. Because the observation came roughly an hour before retrieval, these figures describe an earlier moment and should not be read as the current price.
These are snapshot prices, not executable quotes or verified probabilities. The saved data includes no volume or order book depth, so it cannot indicate liquidity or how many traders are involved. The two prices sum to 1.000, and the gap between them is small. That is all the snapshot shows about how the two outcomes were priced at that moment.
What remains uncertain
The evidence contains no prices after the observation time, so it cannot show how the market moved before the listed end time. It also does not include the TWAP value or the starting price for the window, so it cannot indicate which outcome the rules would produce.
The sample covers one market. The coverage record marks it as not partial and includes all saved markets for this event [1]. That does not establish that the provider lists every possible outcome in the real world, and this contract has only two listed outcomes. The evidence does not explain why the prices were where they were.
References
- Polymarket: Bitcoin Up or Down - October 18, 12:30AM-12:45AM ET. Provider data observed 2026-10-18T00:00:06.191Z.
AI-generated analysis based on market data. Not financial advice.
Saved Oct 18, 2026 UTCOverview
This contract is a short-term Bitcoin price market titled "Bitcoin Up or Down - October 18, 12:30AM-12:45AM ET." It is listed on Polymarket [1] and has two outcomes, Up and Down. The contract asks whether Bitcoin's price moves up or down over a fixed 15-minute window. The source describes the market as resolving to "Up" if the time-weighted average price (TWAP) of Bitcoin over the window in the title is greater than or equal to the price at the start of that window. Otherwise it resolves to "Down" [1]. The price used for settlement is not taken from any exchange or general spot market. The source states that the market is about the price according to the TWAP Chainlink data stream for the BTC/USD pair, and not according to any other sources or spot markets [1]. Chainlink is named as the resolution source, and the source points to its BTC/USD TWAP data stream [1]. Because the outcome depends on an averaged price across the window instead of a single price at the end, the result can differ from a simple comparison of the closing price with the opening price. The listed end time is 04:45 UTC on October 18, 2026 [1]. That corresponds to the 12:45AM ET end of the title window. The provider status recorded in the source was active [1]. The listed time is the contract's scheduled end and should not be read as the time the market was resolved.
Why It Matters
The contract measures the direction of Bitcoin's price over one 15-minute window, using a Chainlink TWAP rather than a single trade or spot quote [1]. Its prices show how traders on the platform were pricing the two outcomes at the time of the snapshot. The recorded prices were 0.505 for Up and 0.495 for Down [1]. These are snapshot values from the platform's listing and are not executable quotes or verified probabilities. The price itself does not show how likely either outcome is. Because the contract settles on a specific averaged data stream, a reader should check the stated rules rather than assume the outcome matches a headline price.
Snapshot context
The latest published provider snapshot for this topic was observed on 2026-10-18 at 00:00 UTC. It contains listings from Polymarket. Market descriptions and listed closing times define the contracts; they do not establish that the real-world outcome has occurred. This article does not include a separately verified news update. [1]
Frequently Asked Questions
What makes the market resolve to Up?
The market resolves to Up if the Chainlink BTC/USD TWAP over the stated time range is greater than or equal to the price at the beginning of that range [1].
Which price source determines the outcome?
The outcome is based on the Chainlink BTC/USD TWAP data stream. The source states that other sources or spot markets are not used for this contract [1].
When is the scheduled end of this contract?
The listed end time is 2026-10-18T04:45:00.000Z, which matches the end of the 12:30AM-12:45AM ET window named in the title [1].
Do the prices show the chance that Bitcoin goes up?
No. The recorded prices of 0.505 for Up and 0.495 for Down are snapshots from the listing [1]. They are not executable quotes or verified probabilities.
AI-written background. References identify the evidence used; Wikipedia links under Learn More are additional reading. Prices and provider rules are dated snapshots. This is not financial advice.
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Price gaps of 2 pp+
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Reviewed equivalent pairs
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No currently reviewed equivalent pairs with both binary Yes prices are available.
Price differences do not establish arbitrage. Check each pair's review, current order prices, fees and settlement rules.